/*
 * Copyright (C) 2019 Sun.Hao(https://www.crazy-coder.cn/)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package lodsve.core.io;

import org.I0Itec.zkclient.exception.ZkMarshallingError;
import org.I0Itec.zkclient.serialize.ZkSerializer;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * zookeeper中读取InputStream.
 *
 * @author <a href="mailto:sunhao.java@gmail.com">sunhao(sunhao.java@gmail.com)</a>
 * @date 2018-1-2-0002 14:37
 */
public class InputStreamSerializer implements ZkSerializer {
    private static final Logger logger = LoggerFactory.getLogger(InputStreamSerializer.class);

    @Override
    public byte[] serialize(Object data) throws ZkMarshallingError {
        if (!(data instanceof InputStream)) {
            return new byte[0];
        }

        try {
            return IOUtils.toByteArray((InputStream) data);
        } catch (IOException e) {
            if (logger.isErrorEnabled()) {
                logger.error(e.getMessage(), e);
            }
            return new byte[0];
        }
    }

    @Override
    public Object deserialize(byte[] bytes) throws ZkMarshallingError {
        return new ByteArrayInputStream(bytes);
    }
}
